She said that because the injuries were so serious, police had not yet managed to get a full account from the victim to determine what happened in the minutes leading up to the slashing, although it is thought he did know his attacker.

Det Insp Haworth said police had stepped up patrols in the area following the incident which happened at around 1.20am on Sunday (MAY 18) in Fawcett Close, in the Galligreaves area.